Carpooling won't do much to reduce U.S. highway congestion in urban areas, and a better solution would be to build new highways and charge drivers fees to use them, the White House said on Monday. ADVERTISEMENT "It is increasingly appropriate to charge drivers for some roadway use in the same way the private market charges for other goods and services," the White House said in its annual report on the U.S. economy. While some urban areas have designated roads for vehicles with two or more passengers, those high-occupancy vehicle (HOV) lanes are often underused because carpooling is becoming less popular,...